<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 图标区 -->
      <div class="avatar_box">
        <img src="@/assets/logo.png" alt="" />
      </div>
      <!-- 表单区 -->
      <el-form
        class="login_form"
        :model="loginForm"
        :rules="loginRules"
        ref="loginFormRef"
      >
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>

        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //登录表单的数据绑定对象
      loginForm: {
        username: "admin",
        password: "123456",
      },
      loginRules: {
        //验证用户名是否合法
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
        //验证密码
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 3,
            max: 15,
            message: "长度在 3 到 15 个字符",
            trigger: "blur",
          },
        ],
      },
    };
  },
  methods: {
    //点击重置按钮，重置登录表单
    resetLoginForm() {
      // console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      //因为参数是回调函数，所以这里写成匿名的箭头函数
      this.$refs.loginFormRef.validate(async (valid) => {
        // console.log(valid);
        if (!valid) return;
        const { data: res } = await this.$http.post("login", this.loginForm);
        if (res.meta.status !== 200) {
          return this.$message.error("登录失败");
        }
        this.$message.success("登录成功");
        // console.log(res);
        //将token保存到客户端的sessionStorage中
        // 存储:window.sessionStorage.setItem(key,value)
        window.sessionStorage.setItem("token", res.data.token);
        //通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push("/home");
      });
    },
  },
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  position: absolute;
  width: 450px;
  height: 300px;
  background-color: rgb(238, 230, 232);
  border-radius: 5px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  position: absolute;
  height: 130px;
  width: 130px;
  border: 1px solid red;
  left: 50%;

  border-radius: 50%;
  padding: 10px;

  transform: translate(-50%, -50%);
  box-shadow: 0 0 10px #ddd;
  background-color: #fff;
  img {
    height: 100%;
    width: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.btns {
  //弹性布局
  display: flex;
  // 尾部对齐
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>